Hey Bill,
Try Goodson Machine tools at 800-533-8010 or <A HREF="WWW.Goodson.com">
www.goodson.com</A>. They have two styles of insert. One is "Bronze-Wall"
which
threads into the iron guide or "Guide-Liners" Kits for either are about $300
each with the "Bronze-Wall" screw in type their choice for precision racing
clearances.
HTH, Steve Smith
<< a Matchless G80CS that I own
that loves to stick the exhaust guide. The most recent iteration is steel,
with a bronze insert that looks like a helicoil. I think Kas recommends
these. I got mine three years ago from a 90 year old machinist who kicked
the bucket before I could find out where he got them. So far so good. I'd
like to install these in Triumph motors, but can't find any.
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